condition mean min max Sterile Frond 0.27748466666666666 0.0 0.609814 Fertile Frond 9.416416666666667 0.0 26.6172 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 0.185783 0.0 0.429182 Root 0.0 0.0 0.0